Preparation

Put the mustard in a small heavy bowl that won’t move around when you start whisking. Slowly whisk in the olive oil to emulsify. If it gets too thick, dilute with a touch of water. Once the oil is incorporated, add the lemon juice and vinegar, season with salt and pepper to taste, and finish with the parsley.

Hugh Acheson,

A New Turn in the South: Southern Flavors Reinvented for Your Kitchen,